Severe convective outbreak in Siberia in May 2020: Event analysis and high-resolution simulation

Shikhov, Andrey; Antokhina, Olga; Gochakov, Alexander; Azhigov, Igor; Blinov, Denis; Gazimov, Timur; Kolker, Alexey; Tarabukina, Lena; Yarinich, Yulia; Chernokulsky, Alexander

doi:10.1016/j.atmosres.2023.107139

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2024

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“…Moreover, ERA5 data are still too coarsely resolved to realistically represent the cyclone structure, and thus underestimate wind speeds (e.g., Gentile & Gray, 2023). So further research using field observations and finer resolution data sets are needed (e.g., Shikhov et al, 2024;Volonté et al, 2024;Xu, 2019).…”

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confidence: 99%

Dynamics of Extreme Surface Winds Inside North Atlantic Midlatitude Cyclones

Son,

Franzke,

Son

2024

Geophysical Research Letters

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North Atlantic midlatitude cyclones are among the most severe weather systems, causing enormous economic damages and threatening human lives. The cyclone is typically characterized by cyclonic convergent surface winds, strong updrafts, and precipitation. However, extreme surface winds are often observed within the cyclone where downdrafts develop. The present study investigates the dynamical and thermodynamical characteristics of the horizontal winds impinging on the cold frontal surface and the associated downdrafts. It is shown that the cyclonic winds into the cold frontal surface are mainly responsible for the downdrafts that transport the high‐altitude horizontal momentum to the surface and cause intense surface winds. About half of the North Atlantic midlatitude cyclones are accompanied by the downdrafts especially in the southern and western parts of the cyclone center.

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